TypedArray can be parameterized with another type constraint. For example, the type constraint TypedArray[Num] will accept array_of(Num, 1, 2, 3.14159), and will also accept array_of(Int, 1, 2, 3) because Int is a subtype of Num.

Can be coerced from a plain ARRAY or an "ArrayObj"; a shallow copy is performed. If the parameter also has a coercion, this will be applied to each item in the new array.

(The examples/ directory that comes with this distribution contains some examples of parameterized & coercible TypedArrays.)